Thermal dilepton production from dropping {rho} based on the vector manifestation
- Department of Physics, Nagoya University, Nagoya, 464-8602 (Japan)
- Gesellschaft fuer Schwerionenforschung (GSI), 64291 Darmstadt (Germany)
We study the pion electromagnetic form factor and the dilepton production rate in hot matter using the hidden local symmetry theory as an effective field theory for pions and {rho} mesons. In this framework, the chiral symmetry restoration is realized as the vector manifestation (VM) in which the massless vector meson becomes the chiral partner of the pion, giving a theoretical support to the dropping {rho} a la Brown-Rho scaling. In the VM, the vector dominance (VD) is strongly violated near the phase transition point associated with the dropping {rho}. We show that the effect of the violation of the VD substantially suppresses the dilepton production rate compared with the one predicted by assuming the VD together with the dropping {rho}.
- OSTI ID:
- 20868086
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 74, Issue 11; Other Information: DOI: 10.1103/PhysRevD.74.114006; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Chiral doubling of heavy-light hadrons and the vector manifestation of hidden local symmetry
Renormalization group equations in a model of generalized hidden local symmetry and restoration of chiral symmetry